Leaks account for the loss of 2.9bn litres of water a day

Equivalent to a swimming pool of Olympic width (25m) and depth (2m), that stretches from Westminster to Reading

Westminster

Windsor Castle

Reading

21 miles

36 miles

(58km)

2.9bn litres

2m

Westminster

Brentford FC

Heathrow

Windsor Castle

M4 motorway

Reading

14 miles

21 miles

28 miles

8 miles

36 miles

(58km)

2.9bn litres

2m